If you are a novice investor with several ASIC containers, then you will use a mining pool and not try to mine solo. When you have 1-2 megawatts per hour of energy consumption, then you will not play the solo mining lottery 
Bitcoin mining is a very profitable business, because mining companies pay back their investments in 1 year.
Is there a thread here that can teach me how to how to join a mining pool? Is that even a guarantee that the ROI for mining is guaranteed in a year? Because that seems kind of a pain to be waiting for it and why are a lot of replies discouraging solo mining? Wouldn't that be the better one especially in terms of transaction fees since that's a reward for miners right? And with solo mining, wouldn't you not be splitting that rewards with other miners in the mining pool? How much is the capital needed to start a bare minimum but would still yield me a profit mining rig?Bitcoin mining is a very profitable business, because mining companies pay back their investments in 1 year.